Stocks opened lower on Friday after data showed U.S. economic growth slowed more than expected in the second quarter, underscoring worries about the recovery.

The Dow Jones industrial average <.DJI> was down 81.74 points, or 0.78 percent, at 10,385.42. The Standard & Poor's 500 Index <.SPX> was down 9.92 points, or 0.90 percent, at 1,091.61. The Nasdaq Composite Index <.IXIC> was down 23.76 points, or 1.06 percent, at 2,227.93.

(Reporting by Caroline Valetkevitch; Editing by Theodore d'Afflisio)